RPD Minor Connector.pdf

Minor Connector COMPONENT OF RPD  Minor Connector ✓A rigid component that links the major connector or base to the other components of the partial denture 1. Direct Retainer 2. Indirect Retainer 3. Denture Base  Functions of Minor Connector 1. Unification and rigidity 2. Stress D...

Minor Connector COMPONENT OF RPD  Minor Connector ✓A rigid component that links the major connector or base to the other components of the partial denture 1. Direct Retainer 2. Indirect Retainer 3. Denture Base  Functions of Minor Connector 1. Unification and rigidity 2. Stress Distribution 3. Bracing through contact with guiding planes 4. Maintain a path of insertion Minor Connector Proximal Truss Arm Plate Ridge Mesh Finishing Tissue Stop Lines  Truss Arm Connects the major connector with the rest Metal thickness at the rest to truss arm junction ✓1.5mm for base metal alloys ✓2.0mm for gold  Proximal Plate Contacts the proximal surface/guiding planes of teeth Guides the denture during insertion/withdrawal Proximal Plate Proximal Plate Shifted slightly lingually Increase rigidity Enhances reciprocation Improves esthetics Often triangular space below the guiding plane(an undercut) NOTE: Should exhibit minimal gingival coverage Relief required when crossing the gingival tissues  Proximal Plate Rigid, cannot be placed in an undercut Block-out placed in undercuts prior to waxing and casting the framework Ridge Mesh Portions of the framework where denture bases attach “retentive struts for acrylic resin” Relief of at least gauge 20 wax over basal seat 1. Open Lattice 2. Mesh 3. Posts 4. Tissue Stop/Metal Stop Ridge Mesh Open Lattice Mesh Ridge Mesh Maxillary – covers the whole ridge Mandibular – covers until 2/3rds of the ridge  Tissue Stop Stop Button/Metal Stop Integral part of mesh A small projection of metal at the distal end of an extension base that contacts the cast and prevents downward movement of the plastic retention area during packing with resin Provides stability to the framework during the stages of transfer and processing Prevents distortion of the framework during processing Usually located on the posterior end of the mesh work Nail head/Post  Finishing Lines Junction between the major connector and the mesh work Should take the form of an angle not greater than 90 degrees Location of the finishing line at the junction of the major and minor connector should be based on restoring the natural palatal shape  Finishing Lines External finishing line is done when making wax pattern Internal finish line which is located on the tissue side of the denture is provided for during blocking out and relieving procedures. Other Requirements/Design Specifications 1. Should have sufficient thickness for rigidity, to transmit forces between the linked components. 2. Should be highly polished to minimized plaque accumulation 3. Should be located at least 5mm from other vertical components